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Equity Compensation Plans (Tables)
 12 Months Ended
Dec. 31, 2020
Share-based Payment Arrangement [Abstract]  
Schedule of Equity-Based Compensation Expense The following table details the components of equity-based compensation expense recognized in net earnings in each of the past three years:
Year Ended December 31202020192018
Stock options$43 $43 $45 
Restricted stock/RSUs58 62 65 
Total equity-based compensation expense, net of tax$101 $105 $110 
Schedule of Assumptions Of Fair Value Options On The Date Of Grant Using Black-Scholes Option Pricing Model We estimate the fair value of stock options on the date of grant using the Black-Scholes option pricing model with the following assumptions for each of the past three years:
Year Ended December 31202020192018
Expected volatility
21.1-26.9%
19.7-20.0%
17.6-18.2%
Weighted average expected volatility21.2 %19.7 %17.6 %
Expected term (in months)606468
Risk-free interest rate
0.4-1.5%
1.7-2.6%
2.6-2.9%
Expected dividend yield2.4 %2.0 %1.8 %
Schedule of Stock Option Activity
A summary of stock option activity during 2020 follows:
In Shares and DollarsShares Under Option Weighted Average
Exercise Price Per Share
Outstanding on December 31, 20199,767,749 $161.54 
Granted2,538,120 165.20 
Exercised(910,572)101.16 
Forfeited/canceled(266,576)174.52 
Outstanding on December 31, 202011,128,721 $167.00 
Vested and expected to vest on December 31, 202010,746,380 $167.02 
Exercisable on December 31, 20206,133,048 $161.18 
Schedule of Stock Options' Intrinsic Value And Remaining Contractual Term
Summary information with respect to our stock options’ intrinsic value and remaining contractual term on December 31, 2020, follows:
Weighted Average  Remaining Contractual Term (in years)Aggregate Intrinsic
Value
Outstanding6.7$56 
Vested and expected to vest6.656 
Exercisable5.156 
Schedule of Restricted Stock And Restricted Stock Unit Activity
A summary of restricted stock and RSU activity during 2020 follows:
In Shares and DollarsShares/
Share-Equivalent 
Units		Weighted Average
Grant-Date Fair Value Per Share
Nonvested at December 31, 20191,224,364 $181.11 
Granted559,168 170.57 
Vested(609,870)172.23 
Forfeited(23,511)173.91 
Nonvested at December 31, 20201,150,151 $180.98